Solar Extreme Events of 2003:
Fundamental Science and Applied Aspects

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HIGH ENERGY NEUTRAL EMISSIONS OF LARGE SOLAR FLARES IN THE END OF OCTOBER, 2003.
Kuznetsov S.N., Kurt V.G., Myagkova I.N., Yushkov B.Yu., Kudela K.,

This report is a description for the large solar flares detected with the spectrometer (SONG) on the CORONAS-F mission during famous period of solar activity in the end of October 2003. The intensive gamma-emission were detected during the impulsive phase of two flares from active region NOAA 0486 - October 28 (11:02-11:13 UT, 17.2/4B, S16E08 ) and October 29 (20:38-20:55 UT, X10/2B, S15W02). The basic scientific data from SONG consist of the counting rate recorded every 4s in each of channels in energy interval 50 keV - 100 MeV. Comparison of the Hard X-ray and gamma-ray emission time behavior with the main SXR source characteristics such a temperature, emission measure and energy injection function G(t) was made. In addition we compared the Neupert's derivative and the energy injection function G(t) with the flux of the 150 keV X-rays, registered by SONG spectrometer to define how the very intense high energy electrons beam deposits its energy into SXR source.





Skobeltsyn Institute of Nuclear Physics, Moscow State University, 2004